<template>
    <div class="sidebar">
        <el-menu
            class="sidebar-el-menu"
            :default-active="onRoutes"
            :collapse="collapse"
            background-color="#324157"
            text-color="#bfcbd9"
            active-text-color="#20a0ff"
            unique-opened
            router
        >
            <template v-for="item in items">
                <template v-if="item.children">
                    <el-submenu :index="item.router" :key="item.router">
                        <template slot="title">
                            <!-- <i :class="item.icon"></i> -->
                            <li :class="item.icon"></li>
                            <span slot="title">{{ item.name }}</span>
                        </template>
                     
                        <template v-for="subItem in (item.children)">
                            <el-submenu
                                v-if="subItem.children"
                                :index="subItem.router"
                                :key="subItem.router"
                            >
                                <template slot="title">
                                    {{ subItem.name }}
                                </template>
                        
                                <el-menu-item v-for="(threeItem,i) in (subItem.children)" :key="i" :index="threeItem.router" >
                                    {{ threeItem.name }}
                                </el-menu-item>
                                
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.router" :key="subItem.router"> 
                                {{ subItem.name }}
                            </el-menu-item>
                        </template>
               
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.router" :key="item.router">
                         <li :class="item.icon"></li>
                        <span slot="title">{{ item.name }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
import bus from '../common/bus';
export default {
    data() {
        return {
            collapse: false,
            items: [
                {
                    icon: 'el-icon-s-home',
                    index: 'dashboard',
                    title: '首页'
                }
            ]
        };
    },
    computed: {
        onRoutes() {
            return this.$route.path.replace('/', '');
        }
    },
    methods:{
        changeApp(id){
           let appMenus = this.$util.get("userInfo").appMenus;
           if(appMenus && appMenus.length>0){
               var position =0;
               if(id){
                    for(var i=0;i<appMenus.length;i++){
                        if(appMenus[i].appId==id){
                            position=i;
                            break;
                        }
                    }
               }
              
                this.items=[];
                let Menus = appMenus[position].menus;
                 if(Menus!=null && Menus.length>0){
                    for(var i=0;i<Menus.length;i++){
                        this.items.push(Menus[i]);
                    }
                }
           }
        },
        filterMenu(menu){
           for(var i=0;i<menu.length;i++){
               if(menu[i].type!="MENU"){
                  menu.splice(i, 1);
               }
           }
           return menu;
        }
    },
    created() {
        // 通过 Event Bus 进行组件间通信，来折叠侧边栏
        bus.$on('collapse', msg => {
            this.collapse = msg;
            bus.$emit('collapse-content', msg);
        });

     
       bus.$on('changeApp', val => {
            this.changeApp(val);
        });

        this.changeApp();
    }
};
</script>

<style scoped>
.sidebar {
    display: block;
    position: absolute;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
    width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
    width: 250px;
}
.sidebar > ul {
    height: 100%;
}
</style>
